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Thermus aquaticus is a species of bacteria found living in the hot springs in Yellowstone National Park. Hot springs typically are areas characterized by low oxygen levels, low light levels and high concentrations of sulfur and calcium carbonate.

Based on the way bacteria live in or near hot springs, which of the following would be the most reasonable explanation for how they create food?


Through the process of photorespiration by using oxygen and light energy to produce carbon dioxide.


Through the process of radiosynthesis by using gamma radiation and melanin to create energy for growth.


Through the process of photosynthesis by using energy from the sun, water, and carbon dioxide to make glucose.


Through the process of chemosynthesis by combining hydrogen sulfide with oxygen and carbon dioxide to make carbohydrates.

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